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Subject[PATCH] selftests: timers: set-timer-lat: Fix hang when testing unsupported alarms
Date
When timer_create() fails on a bootime or realtime clock, setup_timer()
returns 0 as if timer has been set. Callers wait forever for the timer
to expire.

This hang is seen on a system that doesn't have support for:

CLOCK_REALTIME_ALARM ABSTIME missing CAP_WAKE_ALARM? : [UNSUPPORTED]

Test hangs waiting for a timer that hasn't been set to expire.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
tools/testing/selftests/timers/set-timer-lat.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c
index 9c92b7bd5641..ab2fe225e051 100644
--- a/tools/testing/selftests/timers/set-timer-lat.c
+++ b/tools/testing/selftests/timers/set-timer-lat.c
@@ -143,7 +143,8 @@ int setup_timer(int clock_id, int flags, int interval, timer_t *tm1)
printf("%-22s %s missing CAP_WAKE_ALARM? : [UNSUPPORTED]\n",
clockstring(clock_id),
flags ? "ABSTIME":"RELTIME");
- return 0;
+ /* Indicate timer isn't set, so caller doesn't wait */
+ return 1;
}
printf("%s - timer_create() failed\n", clockstring(clock_id));
return -1;
--
2.11.0
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